1 If the ball hits the ceiling it is called out of bounds in international volleyball. 2  Some leagues allow play continue after ball hits the ceiling. 3  If a player commits a fault or violation when playing the ball. 4  To read more details about the faults and violations, go to basic volleyball rules pages.
Environmental impacts. Hydropower is emission-free, renewable energy which does not cause any emissions into the air, water, or soil. The construction of hydropower plants changes waterways and their natural conditions.The main environmental impact during production is caused by the regulation of the waterways.Fortum actively moderates this environmental impact.ortum moderates the environmental impact in many ways. Fortum actively moderates the environmental impact of hydropower production in areas affected by the power economy. The impact on the fishing industry is reduced by stocking fish and restoring habitats.
Hydro-electric Power Plants. Hydro-electric power plants capture the energy released by water falling through a vertical distance, and transform this energy into useful electricity. In general, falling water is channelled through a turbine which converts the water's energy into mechanical power.ydro-electric power has always been an important part of the world's electricity supply, providing reliable, cost effective electricity, and will continue to do so in the future. Hydro power has environmental impacts which are very different from those of fossil fuel power plants.